:root {
  color-scheme: light;
  --text: #24292f;
  --muted: #57606a;
  --line: #d8dee4;
  --link: #0969a2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: 'Hiragino Sans', 'BIZ UDPGothic', 'Yu Gothic', Meiryo, sans-serif;
  line-height: 1.75;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
}

.container {
  width: min(100% - 2.5rem, 50rem);
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  padding-block: 0.85rem;
}

.site-name {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.breadcrumbs {
  margin-block: 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  margin-right: 0.45rem;
  color: var(--muted);
  content: '/';
}

.document {
  padding-bottom: 3rem;
}

.document h1,
.document h2 {
  line-height: 1.4;
}

.document h1 {
  margin: 0 0 1.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.55rem, 4vw, 2rem);
}

.document h2 {
  margin: 2.2rem 0 1rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.25rem;
}

.document p,
.document ul {
  margin-block: 0 1rem;
}

.document ul {
  padding-left: 1.5rem;
}

.document li + li {
  margin-top: 0.35rem;
}

.document code {
  padding: 0.1em 0.3em;
  border-radius: 3px;
  background: #f2f4f6;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.document .lead {
  margin-bottom: 0.25rem;
}

.document .meta,
.site-footer {
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer {
  padding-block: 1.2rem 2.5rem;
  border-top: 1px solid var(--line);
}